<template>
  <li :class="{active:isElement}" @mouseenter="isElement=true" @mouseleave="isElement=false">
    <label>
        <input type="checkbox" :checked="todo.done" @change="changes"/>
        <span>{{todo.title}}</span>
        </label>
        <button class="btn btn-danger" @click="$bus.$emit('deleteTodo',index)">删除</button>
    </li>
       
</template>

<script>
export default {
    name:'Item',
    props:{
      todo:Object,
      index:Number,
    },
    data(){
      return{
        isElement:false
      }
    },
    methods: {
      changes(e){
        const set = e.target.checked
        this.$bus.$emit('checkTodo',{todo:this.todo,isitem:set})
      }
    }
}
</script>

<style scoped>
/*item*/
li {
  list-style: none;
  height: 36px;
  line-height: 36px;
  padding: 0 5px;
  border-bottom: 1px solid #ddd;
}

li label {
  float: left;
  cursor: pointer;
}

li label li input {
  vertical-align: middle;
  margin-right: 6px;
  position: relative;
  top: -1px;
}

li button {
  float: right;
  display: none;
  margin-top: 3px;
}

li.active{
  background-color: #ccc;
}
li.active button{
  display: block;
}

li:before {
  content: initial;
}

li:last-child {
  border-bottom: none;
}
</style>